Single Grain Review (2026): Services, Proof and Score

Single Grain is a digital marketing agency that lists a Miami, Florida, address and calls itself remote-first. Clutch and Built In give 2009 as its founding year. OpenCorporates lists Single Grain LLC as an active California company. CEO Eric Siu says he bought the struggling SEO agency in 2014 for $2. Shaun Merritt is CTO, Nathalie Jans is COO, and Carissa Cope is vice president of client operations. Built In lists 60 employees. Siu co-hosts the daily Marketing School podcast with Neil Patel. The show holds a 4.6 rating from more than 1,200 ratings on Apple Podcasts.

Single Grain's case study page shows 20 studies on 13 named clients, and six give a time frame. Learning A-Z reports a 65% revenue gain in 2024. LS Building Products reports 229% more site conversions over 12 months. Interchain reports 7,400 hackathon registrations in five weeks. The other studies give numbers with no period. Some totals do not add up. The LS Building Products AI study headlines 424 citations, but its two platform counts sum to 287. All figures are self-reported, and Clutch shows 12 reviews at a 4.8 rating.

Single Grain describes its staff as digital marketing specialists. Its about page tells prospects they will hear back from Siu or a senior strategist. Its leadership includes a head of sales and a vice president of client operations. The pages we checked name no account leads and give no delivery timeline. Its AEO page says most clients see AI citation gains within two to three months. Clutch lists a $10,000 minimum project size. The contact form starts monthly budgets below $3,000.

Single Grain sells AEO with a five-step method. It maps real questions, builds structured answers with schema, tunes pages for AI and voice delivery, spreads content across trusted sites, and then measures answer visibility. It reports AI citations, AI Overview appearances, and competitive answer share. It publishes AI results for named clients. SmartRent's Google AI Overview citations rose from 64 to 96, and the study credits AI tools with 10 sales-qualified leads a month. Bierman Autism reports 75% more AI Overview captures. The studies name no tracking tool and give few dates.

The main limits are a small outside record and case study totals that do not always reconcile. Twelve Clutch reviews is a thin independent record. The site lists an address on Biscayne Boulevard in Miami, and Clutch and the state registry list Los Angeles addresses. Ask who will run your account day to day and how senior that person is. Ask which tool measures AI citations and for the raw before-and-after counts. Confirm the contract term and monthly fee in writing.